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根据正交层合板在压缩载荷作用下的泊松效应和变形协调原理,分析了平均层间剪应力的产生机制,并建立了平均层间剪应力的解析模型。算例分析表明纵横铺层比k=1时,层间剪应力最大,k值大于3时可有效降低层间剪应力;层间剪应力与平均压应力和受压截面宽厚比成正比关系,需要根据实际情况选取合适的k值和厚宽比以有效降低平均层间剪应力。
According to the Poisson effect and deformation coordination principle of orthogonal laminates under compressive load, the mechanism of average interlaminar shear stress is analyzed and an analytical model of average interlaminar shear stress is established. The case study shows that the interlaminar shear stress is the largest when the ratio of longitudinal and transverse plies is k = 1, and the interlaminar shear stress can be effectively reduced when the value of k is greater than 3. The interlaminar shear stress is directly proportional to the average compressive stress and the width- According to the actual situation need to select the appropriate k-value and aspect ratio to effectively reduce the average interlaminar shear stress.